kenekaplan writes: "Nearly 600 people in Hamburg, Germany and Chicago test drove seven different Ultrabook convertible prototype comptuers, including “The Swivel,” “The Floating Slider” and “The Ferris Wheel” — which go from laptop or clamshell style to tablet. As the consumers examined each of the mock-ups, Intel researchers and engineers recorded reactions in an effort to fine tune designs that are now hitting the market."